/* 
BSL PRO Custom Styles
File: assets/css/bsl-custom.css
Version: 1.0
*/

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */
:root {
  --bsl-primary: #304658;
  --bsl-primary-dark: #1e3a4a;
  --bsl-primary-light: #4a6b7d;
  --bsl-accent: #ffd700;
  --bsl-white: #ffffff;
  --bsl-gray-100: #f8f9fa;
  --bsl-gray-200: #e9ecef;
  --bsl-gray-300: #dee2e6;
  --bsl-gray-400: #ced4da;
  --bsl-gray-500: #6c757d;
  --bsl-gray-600: #495057;
  --bsl-gray-700: #343a40;
  --bsl-gray-800: #212529;
  
  --bsl-shadow-sm: 0 2px 4px rgba(48, 70, 88, 0.08);
  --bsl-shadow-md: 0 4px 15px rgba(48, 70, 88, 0.15);
  --bsl-shadow-lg: 0 8px 25px rgba(48, 70, 88, 0.2);
  --bsl-shadow-xl: 0 10px 40px rgba(48, 70, 88, 0.25);
  
  --bsl-gradient-primary: linear-gradient(135deg, var(--bsl-primary) 0%, var(--bsl-primary-dark) 100%);
  --bsl-gradient-overlay: linear-gradient(135deg, rgba(48, 70, 88, 0.8) 0%, rgba(30, 58, 74, 0.9) 100%);
  
  --bsl-border-radius: 8px;
  --bsl-border-radius-lg: 12px;
  --bsl-border-radius-xl: 16px;
  --bsl-border-radius-pill: 25px;
  
  --bsl-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --bsl-transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  
  --bsl-z-header: 1000;
  --bsl-z-dropdown: 1010;
  --bsl-z-mobile-menu: 9999;
  --bsl-z-modal: 10000;
}

/* ==========================================================================
   Base Styles & Typography
   ========================================================================== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--bsl-gray-700);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Focus styles for accessibility */
*:focus-visible {
  outline: 1px solid var(--bsl-primary);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  z-index: var(--bsl-z-modal);
  padding: 8px 16px;
  background: var(--bsl-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--bsl-border-radius);
  transition: var(--bsl-transition);
}

.skip-link:focus {
  top: 6px;
}

/* ==========================================================================
   Header & Navigation Styles
   ========================================================================== */

/* Header Container */
.bsl-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--bsl-z-header);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--bsl-gray-200);
  box-shadow: var(--bsl-shadow-sm);
  transition: var(--bsl-transition);
}

.bsl-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--bsl-shadow-md);
}

.bsl-header__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

/* Logo */
.bsl-logo {
  flex-shrink: 0;
}

.bsl-logo__link {
  display: block;
  transition: var(--bsl-transition-fast);
}

.bsl-logo__link:hover {
  transform: scale(1.02);
}

.bsl-logo__img {
  height: 40px;
  width: auto;
  display: block;
}

/* Main Navigation */
.bsl-nav {
  display: flex;
  align-items: center;
}

.bsl-nav__list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
}

.bsl-nav__item {
  position: relative;
}

.bsl-nav__link {
  display: flex;
  align-items: center;
  padding: 25px 20px;
  color: var(--bsl-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  border-bottom: 3px solid transparent;
  transition: var(--bsl-transition);
  gap: 6px;
}

.bsl-nav__link:hover,
.bsl-nav__link:focus {
  color: var(--bsl-primary-dark);
  border-bottom-color: var(--bsl-primary);
}

.bsl-nav__link.active {
  color: var(--bsl-primary);
  border-bottom-color: var(--bsl-primary);
  font-weight: 600;
}

.bsl-nav__arrow {
  width: 8px;
  height: 5px;
  transition: var(--bsl-transition);
}

.bsl-nav__item:hover .bsl-nav__arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.bsl-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--bsl-white);
  border-radius: var(--bsl-border-radius);
  box-shadow: var(--bsl-shadow-xl);
  border: 1px solid var(--bsl-gray-200);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--bsl-transition);
  z-index: var(--bsl-z-dropdown);
}

.bsl-nav__item:hover .bsl-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.bsl-dropdown__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bsl-dropdown__item {
  margin: 0;
}

.bsl-dropdown__link {
  display: block;
  padding: 12px 24px;
  color: var(--bsl-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: var(--bsl-transition-fast);
}

.bsl-dropdown__link:hover,
.bsl-dropdown__link:focus {
  background: var(--bsl-gray-100);
  color: var(--bsl-primary-dark);
  padding-left: 32px;
}

/* Header Actions */
.bsl-header__actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* CTA Button */
.bsl-cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  background: var(--bsl-gradient-primary);
  color: var(--bsl-white);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--bsl-border-radius-pill);
  box-shadow: var(--bsl-shadow-md);
  transition: var(--bsl-transition);
  border: none;
  cursor: pointer;
}

.bsl-cta-btn:hover,
.bsl-cta-btn:focus {
  transform: translateY(-2px);
  box-shadow: var(--bsl-shadow-lg);
  color: var(--bsl-white);
}

.bsl-cta-btn:active {
  transform: translateY(0);
}

/* Language Switcher */
.bsl-lang-switcher {
  position: relative;
}

.bsl-lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  background: var(--bsl-gray-100);
  border: 1px solid var(--bsl-gray-300);
  border-radius: var(--bsl-border-radius);
  cursor: pointer;
  transition: var(--bsl-transition);
  font-size: 14px;
  font-weight: 500;
  color: var(--bsl-primary);
  text-decoration: none;
}

.bsl-lang-current:hover {
  background: var(--bsl-gray-200);
  border-color: var(--bsl-gray-400);
}

.bsl-lang-flag {
  font-size: 16px;
}

.bsl-lang-arrow {
  width: 8px;
  height: 5px;
  transition: var(--bsl-transition);
}

.bsl-lang-switcher:hover .bsl-lang-arrow {
  transform: rotate(180deg);
}

.bsl-lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 120px;
  background: var(--bsl-white);
  border-radius: var(--bsl-border-radius);
  box-shadow: var(--bsl-shadow-lg);
  border: 1px solid var(--bsl-gray-200);
  padding: 8px 0;
  margin-top: 5px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--bsl-transition);
  z-index: var(--bsl-z-dropdown);
}

.bsl-lang-switcher:hover .bsl-lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.bsl-lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  color: var(--bsl-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--bsl-transition-fast);
}

.bsl-lang-option:hover,
.bsl-lang-option:focus {
  background: var(--bsl-gray-100);
  color: var(--bsl-primary-dark);
}

/* ==========================================================================
   Mobile Menu Styles
   ========================================================================== */

/* Mobile Header */
.bsl-mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--bsl-z-mobile-menu);
  background: var(--bsl-primary);
  padding: 0 20px;
  height: 64px;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--bsl-shadow-md);
}

.bsl-mobile-logo {
  color: var(--bsl-white);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
}

/* Hamburger Menu */
.bsl-hamburger {
  position: relative;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: calc(var(--bsl-z-mobile-menu) + 1);
}

.bsl-hamburger__line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--bsl-white);
  border-radius: 2px;
  transition: var(--bsl-transition);
}

.bsl-hamburger__line:nth-child(1) { top: 0; }
.bsl-hamburger__line:nth-child(2) { top: 50%; transform: translateY(-50%); }
.bsl-hamburger__line:nth-child(3) { bottom: 0; }

.bsl-hamburger.active .bsl-hamburger__line:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.bsl-hamburger.active .bsl-hamburger__line:nth-child(2) {
  opacity: 0;
}

.bsl-hamburger.active .bsl-hamburger__line:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* Mobile Menu Overlay */
.bsl-mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: var(--bsl-z-mobile-menu);
  opacity: 0;
  visibility: hidden;
  transition: var(--bsl-transition);
}

.bsl-mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.bsl-mobile-menu__content {
  position: absolute;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 400px;
  height: 100vh;
  background: var(--bsl-white);
  transform: translateX(100%);
  transition: var(--bsl-transition);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.bsl-mobile-menu.active .bsl-mobile-menu__content {
  transform: translateX(0);
}

.bsl-mobile-menu__header {
  padding: 20px;
  border-bottom: 1px solid var(--bsl-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bsl-mobile-menu__logo {
  height: 32px;
  width: auto;
}

.bsl-mobile-menu__close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--bsl-primary);
  cursor: pointer;
  padding: 5px;
  line-height: 1;
}

.bsl-mobile-menu__nav {
  flex: 1;
  padding: 20px 0;
}

.bsl-mobile-menu__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bsl-mobile-menu__item {
  border-bottom: 1px solid var(--bsl-gray-100);
}

.bsl-mobile-menu__link {
  display: block;
  padding: 16px 20px;
  color: var(--bsl-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--bsl-transition-fast);
}

.bsl-mobile-menu__link:hover,
.bsl-mobile-menu__link:focus {
  background: var(--bsl-gray-100);
  color: var(--bsl-primary-dark);
}

.bsl-mobile-submenu {
  background: var(--bsl-gray-50);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.bsl-mobile-submenu.active {
  max-height: 300px;
}

.bsl-mobile-submenu__link {
  padding: 12px 40px;
  font-size: 14px;
  color: var(--bsl-gray-600);
}

.bsl-mobile-menu__cta {
  padding: 20px;
  border-top: 1px solid var(--bsl-gray-200);
}

.bsl-mobile-menu__cta .bsl-cta-btn {
  width: 100%;
  justify-content: center;
}

/* Prevent body scroll when mobile menu is open */
body.mobile-menu-open {
  overflow: hidden;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

@media (max-width: 1200px) {
  .bsl-header__container {
    padding: 0 15px;
  }
  
  .bsl-nav__link {
    padding: 25px 15px;
    font-size: 14px;
  }
}

@media (max-width: 992px) {
  .bsl-nav__link {
    padding: 25px 12px;
  }
  
  .bsl-header__actions {
    gap: 15px;
  }
  
  .bsl-cta-btn {
    padding: 10px 20px;
    font-size: 13px;
  }
}

@media (max-width: 768px) {
  .bsl-header {
    display: none;
  }
  
  .bsl-mobile-header {
    display: flex;
  }
  
  body {
    padding-top: 64px;
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.bsl-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.bsl-text-center {
  text-align: center;
}

.bsl-text-primary {
  color: var(--bsl-primary);
}

.bsl-bg-primary {
  background-color: var(--bsl-primary);
}

.bsl-shadow {
  box-shadow: var(--bsl-shadow-md);
}

.bsl-rounded {
  border-radius: var(--bsl-border-radius);
}

.bsl-transition {
  transition: var(--bsl-transition);
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .bsl-header,
  .bsl-mobile-header,
  .bsl-mobile-menu {
    display: none !important;
  }
}